The official Twitter account for the Alameda County Sheriff’s Department retweeted a posting from alt-right founder and white nationalist Richard Spencer on Monday.

The retweet is a video of a press conference Spencer held earlier in the day, in which he panned assertions that President Donald Trump was disavowing a white supremacist rally that turned deadly on Saturday. During that press conference, Spencer called Trump’s comments “kumbaya nonsense,” and said “only a dumb person would take those lines seriously.”

The Alameda County Sheriff’s Twitter account responded to a reporter who asked why the department was retweeting Spencer. The account replied, “That was an accidental retweet and was in no way done intentionally,” but retweet was not immediately deleted.

A follow-up tweet read: “We are working to take this accidental retweet down. It is not showing up in our feed for is is [sic] to delete.”